EP 0569104 A1 19931110 - Portable spectrophotometer.
Title (en)
Portable spectrophotometer.
Title (de)
Tragbares Spektrophotometer.
Title (fr)
Spectrophotomètre portable.
Publication
Application
Priority
US 88080792 A 19920508
Abstract (en)
A portable spectrophotometer includes a small-diameter optical sphere (101) as well as optical detectors (130, 136) and signal processing and display circuitry (140, 142) which allows the instrument to be taken to an object to be measured and which provides a readout of color values at the portable instrument. The instrument is capable of providing specular-included and specular-excluded color readings simultaneously. The interior of the integrating sphere is coated with a highly reflective, color-absorbing material, and light from an incandescent lamp (103) is diffused within the sphere prior to reaching the object to be measured. The sphere is provided with a first aperture (120) which receives spectrally-included light and which is positioned to absorb a spectral component of the diffused source light. A second aperture (125) positioned at a corresponding angular position with respect to the object measures specular-excluded light, excluding the specular component absorbed by the first aperture. By appropriately combining the specular-included and specular-excluded light at one wavelength, a value for the specular component is derived. <IMAGE>
IPC 1-7
IPC 8 full level
G01J 3/00 (2006.01); G01J 3/02 (2006.01); G01J 3/50 (2006.01); G01N 21/47 (2006.01); G01N 21/55 (2006.01)
CPC (source: EP US)
G01J 3/02 (2013.01 - EP US); G01J 3/0232 (2013.01 - EP US); G01J 3/0251 (2013.01 - EP US); G01J 3/10 (2013.01 - EP US); G01J 3/51 (2013.01 - EP US); G01J 3/513 (2013.01 - EP US); G01N 21/474 (2013.01 - EP US); G01N 21/55 (2013.01 - EP US); G01N 2021/556 (2013.01 - EP US); G01N 2201/065 (2013.01 - EP US)
Citation (search report)
- [A] EP 0306337 A2 19890308 - KURASHIKI BOSEKI KK [JP]
- [A] US 4995727 A 19910226 - KAWAGOE NOBUKAZU [JP], et al
- [A] EP 0200918 B1 19900808
- [A] EP 0099023 A2 19840125 - COMPUR ELECTRONIC GMBH [DE]
- [A] US 3490849 A 19700120 - HAMBLETON JAMES
Designated contracting state (EPC)
BE CH DE FR GB IT LI
DOCDB simple family (publication)
EP 0569104 A1 19931110; EP 0569104 B1 19971008; CA 2095261 A1 19931109; DE 69314377 D1 19971113; DE 69314377 T2 19980520; JP 3406640 B2 20030512; JP H0643030 A 19940218; US 5369481 A 19941129
DOCDB simple family (application)
EP 93201318 A 19930507; CA 2095261 A 19930430; DE 69314377 T 19930507; JP 12496693 A 19930429; US 88080792 A 19920508